Recent Submissions

Since the first measurements of neuronal avalanches, the critical brain hypothesis has gained traction.
However, if the brain is critical, what is the phase transition? For several decades, it has been known that the
cerebral cortex operates in a diversity of regimes, ranging from highly synchronous states (with higher
spiking variability) to desynchronized states (with lower spiking variability). Here, using both new and
publicly available data, we test independent signatures of critical...

We investigated the extent to which obesity could identify autonomic dysfunction of heart control in a cross-sectional study with 65 women (aged 18-45 years), categorized as eutrophic, overweight or obese. We collected anthropometric measures and measures of heart rate variability (HRV) between March 2015 and March 2017. Low frequency in normalized units (LF(nu)) over 46 was considered a marker of autonomic imbalance and high frequency in normalized units (HF(nu)) below 38 a marker of depress...

Objectives: to propose the use of a Bayesian hierarchical
model to study the allometric scaling of the
fetoplacental weight ratio, including possible
confounders.
Methods: data from 26 singleton pregnancies with
gestational age at birth between 37 and 42 weeks
were analyzed. The placentas were collected immediately
after delivery and stored under refrigeration
until the time of analysis, which occurred within up to
12 hours. Maternal data were collected from medical
records. A Bayes...

In some survival studies part of the population may be no longer subject to the event of interest. The called cure rate
models take this fact into account. They have been extensively studied for several authors who have proposed extensions
and applications in real lifetime data. Classic large sample tests are usually considered in these applications, especially
the likelihood ratio. Recently a new test called gradient test has been proposed. The gradient statistic shares the same
asymptot...